Fastest way to export 4k video frame to jpg?

Hello, I have been screenshoting to export frames of video… I'm sure there is a better way If anyone has any suggestions on the best software to make this an efficient process it would be much appreciated.

Thanks; I also found a way in adobe lightroom.... there is a little square icon next to the timer on the playbar... click it to bring up the capture frame button. It is a two click process; so pretty efficient. The exported jpgs end up in the same folder as the video file.